Complete DIY Installation Guide SPARE PARTS for HOWO CAB 

Pre-installation: Tools and critical compatibility checks

Replacing a cab on a HOWO truck is not just a mechanical procedure, but a complex engineering operation that requires millimeter precision. In our practice, we have seen cases when, due to incorrectly selectedSPARE PARTS for HOWOthe cabin did not fit on the frame, which led to equipment downtime for 5-7 days and additional costs for modifying the fastenings. Before starting work, make sure that you have a full set of original or certified analog parts, since the use of counterfeit parts often leads to mismatched seats. To successfully complete the task, you will need a hydraulic lift or crane with a lifting capacity of at least 1.5 tons, a torque wrench with a range of up to 300 Nm, a set of sockets (including extensions), mounting crowbars and a marker for marking.

Particular attention should be paid to documenting part numbers. HOWO cabs come in a variety of configurations, from standard day cabs to high-roof-top sleepers, and even a slight difference in the chassis number can mean different airbag mounting geometry or wiring. We recommend requesting your vehicle's VIN and comparing it with the supplier's inventory prior to shipment. Jinan Metallid Auto Co., Ltd., as an industrial and trading enterprise in the auto parts production center of Jinan, implements strict multi-level quality control, checking that the labeling of each batch matches the specific order, which minimizes the risk of receiving an incompatible component. If you work with distributors who have access to such a verification system, the likelihood of error is reduced to almost zero.

Personnel safety comes first. The HOWO cabin weighs from 450 to 600 kg complete with interior, and the fall of such a load can lead to fatal consequences. Never attempt to support the cab by hand or use unsafe supports. Make sure the work area is clear of debris and the garage floor can support the load from lifting equipment. Also prepare a clean rag and degreaser to treat the mating surfaces - any dirt or old paint can disrupt the seal of the joints and cause vibration when moving.

Dismantling the old cabin: step-by-step algorithm and hidden risks

The process of removing the cabin begins with de-energizing the on-board network. Disconnect the negative terminal of the battery and wait at least 10 minutes before any manipulation of the electrical wiring to avoid short circuit or airbag deployment. This is a critically important stage that many ignore, relying on experience, but in our work we recorded a case of damage to the ECU control unit precisely because of residual voltage when the harnesses were disconnected. Carefully disconnect all electrical connectors from the frame to the cab: headlights, instrument panel, fuel level sensors and air conditioning systems. Mark each connector with colored tape or tags - it’s easy to mix them up when reinstalling, and troubleshooting will then take hours.

The next stage is to disconnect the pneumatic and hydraulic lines. HOWO trucks often use quick-release fittings, but over time they can become sticky due to corrosion or contamination. Do not use excessive force: use a penetrating lubricant and let it work for 15-20 minutes. Remove the protective caps immediately after disconnecting the hoses to prevent dust and moisture from entering the system. Pay special attention to the brake pipes - any deformation or crack will require replacing the entire section of the line, which will increase downtime.

1. Loosen the bolts securing the cab to the frame, but do not unscrew them completely. There are usually four or six of them, located at the corners of the cabin base. Use an impact wrench only for the initial stripping of the threads; do the final unscrewing by hand to control the position of the cab.
2. Install the lifting equipment strictly at the center of gravity of the cabin. The lifting point is usually marked by the manufacturer with special eyes or reinforced zones on the frame. Incorrect slinging will lead to distortion and deformation of the cabin side members.
3. Slowly raise the cab to a height of 10-15 cm and inspect the lower part for snags. Often forgotten brackets or wires can hold the booth up, creating dangerous tension.
4. Completely unscrew the mounting bolts and carefully move the cabin to the side, lowering it onto pre-prepared wooden beams or special racks. Do not leave the cabin hanging on the hook longer than necessary.
5. Clean the frame seats from rust, old paint and sealant residues. Check the condition of the rubber cushions of the shock absorbers - if they have cracks or have lost elasticity, they must be replaced with new ones.

A common mistake during dismantling is neglecting the condition of the fastening elements. Bolts that have been used for more than 3 years in conditions of high humidity and vibration often develop fatigue cracks. We strongly recommend not to reuse them, even if they appear intact. The cost of a new set of grade 10.9 bolts is negligible compared to the risk of the cab being torn off while underway. After removing the cabin, troubleshoot the frame: check for cracks in the side members and cross members, especially in stress concentration zones near mounting points.

Installation of a new SPARE PARTS for HOWO: details of assembly and adjustment

Installation of a new cabin requires pinpoint precision when aligning holes. Even factory onesSPARE PARTS for HOWOmay have minimal tolerances, which, if installed incorrectly, will lead to skewed doors or difficulty closing them. Start by installing new rubber dampers on the frame - they should fit snugly, without gaps. Apply a thin layer of graphite grease to the top surface of the dampers to help the cab slide during final landing. Lift the new cab and slowly lower it onto the frame, guiding the bolts into the holes. At this point you will need the help of a second person or use mounting cones for alignment.

Tighten the fastening bolts by hand until they stop, ensuring preliminary fixation. Do not tighten them completely right away - first you need to check the installation geometry. Open and close the doors several times, making sure that the gaps are even around the entire perimeter and that the locks operate smoothly. If the door catches on the threshold or does not close well, loosen the bolts and slightly move the cabin in the desired direction. Adjusting the position of the cab to the frame is an iterative process that can take anywhere from 30 minutes to 2 hours depending on the condition of the new parts and the skill of the mechanics.

Once aligned, proceed to final tightening of the fasteners. Use a torque wrench and follow the tightening torque specified in the repair manual (usually 280-320 Nm for main bolts). Tighten in a crisscross pattern, starting from the center outward to ensure even contact between the cab base and the frame. Violation of the tightening sequence can lead to deformation of the cabin floor and the appearance of squeaks during operation. After tightening, check the door gaps and the operation of the locks again - vibration during tightening could slightly displace the elements.

Electrical and pneumatic connections require care. Refer to the diagram that you drew up during dismantling. All connectors should snap into place with a characteristic click, and the clamps on the hoses should be securely tightened. Pay special attention to ground wires: poor ground contact is the cause of 40% of all electrical faults in Chinese-made trucks. Clean the contact pads until they are shiny and treat them with preservative lubricant. Jinan Metallic Auto Co.,Ltd provides comprehensive technical data and support every step of the way, helping partners avoid these mistakes with personalized butler-style service.

The final stage is checking the tightness and functionality. Start the engine and check the operation of all systems: windshield wipers, heater, signals, instrument panel lights. Carry out a test of the pneumatic system: pump up the pressure and listen to the connections for air leaks. The cabin can be washed and an anti-corrosion coating applied to the lower part only after a complete check of all systems. Remember that the warranty on installed parts is often void if the installation is carried out in violation of the technology, so record each stage of work with a photo report.

Quality control and typical mistakes when replacing a cabin

Even when using quality components, the human factor remains the main source of problems. In our practice, there have been cases where customers complained about vibration in the cabin a month after replacement, and the reason turned out to be a forgotten technological transportation bolt inside the shock absorber or an incorrect tightening sequence of the nuts. To avoid such situations, implement a work acceptance checklist. This should include checking the torque of all critical connections, visually inspecting the integrity of wiring harnesses and hoses, and test driving for abnormal noise.

One of the most common mistakes is ignoring the condition of related parts. When changing the cab, many people forget to check the condition of the driveshaft connecting the steering column to the steering mechanism. If the cabin has been installed offset, the cardan may operate at an angle exceeding the permissible angle, which will lead to rapid wear of the crosspieces and vibration of the steering wheel. Also often overlooked is the condition of the gearshift cables - their length is designed for a certain position of the cab, and if there is an installation error, the gearshift lever may not engage or knock out a gear.

Another important aspect is adaptation to climatic conditions. If you are installing the cabin in a region with extremely low temperatures (for example, the Southern Urals or Central Siberia, where Jinan Metallid Auto LLC has a strong customer base), make sure that the seals and plastic elements used are frost-resistant. Conventional rubber seals harden at -40°C and lose their tightness, which leads to frosting of the doors and snow getting into the interior. Request from suppliers certificates of compliance with climate design UHL1 or similar standards for northern regions.

Don't forget about the documentation. After completing the work, fill out a certificate of completion indicating the serial numbers of the installed components and the date of installation. This will be useful in warranty cases and in the future sale of the car. Save the packaging of new parts for at least a month - sometimes situations arise when a part turns out to be defective, and the presence of the original packaging simplifies the return or exchange procedure.

Choosing a supplier: why originality and service are more important than price

The spare parts market for Chinese trucks is saturated with offers, but the quality of the products varies dramatically. Cheap analogues are often made of low-grade metal, which reduces the service life of the part by 30-50%. For example, low-carbon steel cabin mounting brackets may burst at the first serious overload or accident, while the original parts are heat-treated and have a safety margin. BuyingSPARE PARTS for HOWO, you are buying not just hardware, but the safety of the driver and the safety of the cargo. Saving 10-15% on the cost of the cabin can result in a month of machine downtime due to unforeseen breakdowns.

A professional team of international sales specialists with more than 10 years of experience working at Jinan Metalled Auto Co., Ltd. ensures accurate selection of components and minimizes risks for the customer. Unlike ordinary resellers, the company does not have its own assembly facilities, but implements strict quality control at all stages of the supply chain: from the initial verification of compliance with technical characteristics to the final verification of the configuration. Each batch is individually tested in accordance with the requirements of a specific order, which is especially important for complex components such as cabins, where the number of modifications is in the hundreds.

The company's butler-style service includes proactive communication of order progress and provision of detailed technical documentation. This means that you will receive not just a box with parts, but full support: from assistance in selecting by VIN to advice on the nuances of installation. Flexible packaging and labeling options allow distributors and repair shops to optimize their logistics processes. This approach forms reliable partnerships in international markets and is confirmed by long-term cooperation with clients in dozens of countries around the world.

When choosing a supplier, pay attention to his specialization. Department stores rarely have deep expertise in a specific niche. A company that focuses on exporting original and compatible spare parts for trucks, special equipment and buses made in China, like Jinan Metallic Auto Co., Ltd., understands the specifics of the SITRAK, SHACMAN, FAW and other brands better than anyone else. A wide product matrix, covering parts for suspension, axles, brake systems and engines (Weichai, Yuchai, Cummins), allows you to cover all the fleet's needs in one window, eliminating the need to work with dozens of different contractors.

A supplier's global competitiveness is determined not only by price, but also by its ability to solve non-standard problems. The company's vision is to continuously optimize the supply chain, allowing it to quickly respond to market changes and customer demands. The principles “customer comes first, quality comes first, service comes first” are not just declared, but implemented in every business process. If you are looking for a reliable partner to supply your fleet or service center, pay attention to those who are ready to offer a complete solution, and not just sell a product.

Frequently Asked Questions

How to distinguish an original HOWO cabin from a fake by visual inspection?

Pay attention to the quality of welds and paint. The original cabins have smooth, neat seams without pores or sagging, and the paint is applied using cataphoresis, which ensures high corrosion resistance. Fakes often show traces of manual finishing, uneven geometry and cheap enamel that chips at the slightest impact. Also check the markings: on original parts the number is clearly stamped and corresponds to the catalogue, while on counterfeit parts it may be etched or stickered on.

Can the cabin from HOWO A7 be installed on HOWO 371 chassis?

This is possible, but requires significant improvements. Cabins of different series have different mounting geometries and electrical wiring. You'll need to make adapter brackets, redo the wiring harnesses, and possibly modify the floor tunnel. We do not recommend doing this yourself without drawings and experience, as the risk of a security breach is very high. It is better to choose a cab designed specifically for your chassis model to avoid compatibility issues.

What is the service life of rubber cabin mounting pads?

The average service life is 3-5 years or 300,000 - 400,000 km, depending on operating conditions. В тяжелых дорожных условиях или при постоянных перегрузках ресурс может сократиться до 2 лет. Признаками износа являются появление трещин, потеря эластичности и увеличение вибрации кабины. Замена подушек должна производиться комплектом, чтобы обеспечить равномерную работу подвески кабины.

Нужно ли делать сход-развал после замены кабины?

Нет, замена кабины не влияет на углы установки колес, так как она не затрагивает элементы передней подвески и рулевого управления, связанные с осью. Однако после установки необходимо обязательно проверить и отрегулировать положение рулевой колонки и тяг, чтобы исключить биение руля и неравномерный износ шин. Также стоит проверить работу фар, так как изменение высоты кабины может сбить угол наклона светового пучка.

Где найти схему подключения электрики для конкретной модели кабины?

Схемы обычно прилагаются к руководству по ремонту автомобиля или доступны у официальных дилеров. При покупке запчастей у специализированных поставщиков, таких как ООО Цзинань Мэтллид Авто, вы можете запросить необходимую техническую документацию в рамках сервиса поддержки. Наличие правильной схемы критически важно для правильного подключения и предотвращения повреждений электронных блоков управления.

Замена кабины на грузовике HOWO — ответственный процесс, требующий квалифицированного подхода и качественных комплектующих. The right choiceSPARE PARTS for HOWOи соблюдение технологии монтажа гарантируют долгую и безопасную эксплуатацию вашего автомобиля. Не рискуйте репутацией и безопасностью, доверяя установку непроверенным подрядчикам или используя сомнительные детали. Свяжитесь с нами сегодня, чтобы получить профессиональную консультацию и доступ к широкому ассортименту сертифицированных компонентов для вашей техники. Мы готовы стать вашим надежным партнером в мире автомобильных запчастей, предлагая решения, проверенные временем и опытом тысяч довольных клиентов.